Overview#

The EVOX1 is a 3.3V logic microcontroller. Sensors will need to be 3.3V compaitable for correct operation. Although the device is a 3.3V logic microcontroller, it has a 5V rail on the servo ports to provide sufficient power to the servos connected.

Hardware Features#

The EVOX1 boasts the following features:

Ports

  • 4 x EV3 Motor Ports

  • 4 x Motor Ports with Encoder (shared pins with EV3 Motor Ports)

  • 8 x Servo Ports

  • 8 x I2C Multiplexed Ports

  • 4 x EV3 Sensor Ports

  • 8 x GPIO Ports (shared pins with EV3 Sensor Ports)

  • 2 x UART/ SPI hybrid port

  • 2 x I2C port

Peripherals

  • 4kHz Buzzer

  • 128 x 64 - 1.54 inch OLED Display

  • Programmable Button

  • RGB LED Indicator (shared pins with Programmable Button)

Wireless Functionalities

  • Bluetooth Classic via inbuilt HC-05

  • Bluetooth Low Energy 5.0

  • Integrated Wi-Fi 4 (802.11b/g/n, 2.4GHz)

On-Board Peripherals#

EVOX1 Pherperials
Peripherals#

Peripheral

Description

Power Button
On momentary press turns the EVOX1 on
On long press turns the EVOX1 off

Boot Button
On momentary press puts the EVOX1 into normal mode
On long press puts the EVOX1 into bootloader mode

Bluetooth Button
On momentary press turns the Bluetooth on
On long press turns the Bluetooth off

Programmable Button
Button that can be programmed
Must be used as INPUT_PULLUP
Connected to the same IO14 as the RGB LED

USB Power LED RED

Indicates power going into the EVOX1 from the USB-C port

Charging LED GREEN
Steady Charging
Blinking Unable to charge
Off Battery is full

Power On LED GREEN

Indicates that the EVOX1 is on

Bluetooth LED BLUE
Blink Cnce in 2s Bluetooth in command mode / Connected
Repeated Blinking Waiting for connection / Disconnected
Off Bluetooth is off

USB-C Download & Charging

Allows download and charging of power

RGB LED
WS2812 RGB LED
Connected to the same IO14 as the programmable button

4kHz Buzzer

Programmable buzzer

128 x 64 OLED Display

Programmable OLED Display

Pinouts#

EVOX1 Pinouts

Connecting Hardware#

  • Peripherals which uses GPIO or SERVO ports have 3-pin connectors

  • Peripherals which uses I2C or Serial Ports have 4-pin connectors

  • Motors uses 6-pin connectors

Note

The wires are color coded to match the pin layout of the EVOX1. However do be careful as some peripherals may have their labels covered by the the 3D printed casing. Please see the schematic of the each peripherals.

I2C Wiring#

Colour

Pin

Description

Black

GND

Ground

Red

3V3

3.3V Power

Yellow

SCL

Serial Clock

Yellow

SDA

Serial Data

I2C is wired such that the SDA pin of the host (EVN Alpha) is connected to the SDA pin of a peripheral, and the same goes for the SCL pins.

Motor Wiring#

Colour

Pin

Description

Red

M1

Motor output 1

Red

M2

Motor output 2

Black

GND

Ground

Red

3.3V

Power

Yellow

IO

Encoder pin 1

Yellow

IO

Encoder pin 2

GPIO & Servo Wiring#

Color

Pin

Description

Black

GND

Ground

Red

VCC

Power

Yellow

GPIO

Data

Caution

The pins on the EVOX1 are color coded. Exercise caution when connecting any hardware to the ports.